6-dimethylamino-4-methyl-2,5,8(1H)-quinolinetrione

4,7-dimethyl-1H-pyrido[3,2-g]quinoline-2,5,10-trione

6-chloro-3-methylquinoline-5,8-dione

5-甲基吡啶-2,3-二羧酸二乙基酯

2-氰基-5-甲基吡啶